Concrete (2004)

A brutal crime traps a group of teens in a spiral of guilt and silence

Inspired by real events, Concrete follows four high school boys in 1980s Japan who kidnap a teenage girl and imprison her in a suburban home. What begins as a reckless act descends into unthinkable cruelty, as group dynamics, fear, and apathy fuel a horrifying descent that none of them can undo. A disturbing look at complicity, power, and moral collapse.